Upgrading of encryption
First Claim
1. A method of providing an upgrade for encryption used to encrypt video content stored in a Digital Versatile Disc (DVD) from an old encryption process to a new encryption process, comprising:
- selecting a portion of video content for dual partial encryption;
dual partial encrypting the video content so that the video content has a clear portion, a portion encrypted using the old encryption process and a portion encrypted using the new encryption process;
storing the dual partial encrypted video content on the DVD so that a first program chain references the clear portion and the portion encrypted using the old encryption process, and so that a second program chain references the clear portion and the portion encrypted using the new encryption process.
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Accused Products
Abstract
A method of upgrading an encryption process for encryption of video information from an old encryption process to a new encryption process, consistent with certain embodiments involves selecting a portion of video content for selective encryption. The selected portion is duplicated to produce first and second copies of the selected portion. The first copy is encrypted using the old encryption process and the second copy is encrypted using the new encryption process to produce a dual partially encrypted segment of video information that can either be broadcast over a cable or satellite system or stored in a package medium as two program chains.
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Citations
38 Claims
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1. A method of providing an upgrade for encryption used to encrypt video content stored in a Digital Versatile Disc (DVD) from an old encryption process to a new encryption process, comprising:
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selecting a portion of video content for dual partial encryption;
dual partial encrypting the video content so that the video content has a clear portion, a portion encrypted using the old encryption process and a portion encrypted using the new encryption process;
storing the dual partial encrypted video content on the DVD so that a first program chain references the clear portion and the portion encrypted using the old encryption process, and so that a second program chain references the clear portion and the portion encrypted using the new encryption process. - View Dependent Claims (2, 3, 4)
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5. A method of providing an upgrade for encryption used for encryption of video content stored in package medium from an old encryption process to a new encryption process, comprising:
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selecting a portion of video content for selective encryption;
duplicating the, selected portion of content to produce first and second copies of the selected portion;
encrypting the first copy of the selected portion using the old encryption process;
encrypting the second copy of the selected portion using the new encryption process;
storing the portion of the video content which is not selected as clear content on the package medium;
storing the encrypted first copy and the encrypted second copy of the selected portion on the package medium. - View Dependent Claims (6, 7, 8)
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9. A method of playback of content stored on a recording medium, comprising:
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reading a portion of the recording medium to determine that the recording medium contains content containing portions encrypted under multiple encryption techniques;
selecting content having portions encrypted under one of the multiple encryption techniques; and
playing the content, wherein the playing comprises decrypting the encrypted portion of the content. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A selectively encrypted digital video signal embodied in an electronic recording medium, comprising:
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a sequence of packets of video data, wherein the sequence of packets when not encrypted represent a segment of video content;
wherein certain of the packets are dual encrypted using a legacy encryption method and a replacement encryption method; and
a segment of code that identifies the packets encrypted using the legacy encryption method and the packets encrypted using the replacement encryption method as separate program chains. - View Dependent Claims (16)
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17. A method of providing an upgrade for encryption used for encryption of video content for electronic distribution by a content provider from an old encryption process to a new encryption process, comprising:
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selecting a portion of video content for dual partial encryption;
dual partial encrypting the video content so that the video content has a clear portion, a portion encrypted using the old encryption process and a portion encrypted using the new encryption process;
transmitting the dual partial encrypted video content over a broadcast medium. - View Dependent Claims (18, 19, 20, 21)
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22. A method of decoding a stream of packets containing electronically distributed video content from a content provider, wherein the content is dual partially encrypted using an old encryption process and a new encryption process, comprising:
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receiving the stream of dual partially encrypted video content;
discarding packets encrypted by the old encryption process;
decrypting packets encrypted by the new encryption process; and
combining the decrypted packets with unencrypted packets to create a clear stream of packets for decoding. - View Dependent Claims (23, 24, 25, 26)
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27. A selectively encrypted digital video signal embodied in a carrier wave, comprising:
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a stream of packets of video data, wherein the stream of packets when not encrypted represent a segment of video content;
certain of the packets being unencrypted and certain of the packets being encrypted under a legacy encryption method and certain of the packets being encrypted under a replacement encryption method;
a first segment of code that identifies the unencrypted packets by a first packet identifier (PID); and
a second segment of code that identifies the encrypted packets by a second packet identifier (PID). - View Dependent Claims (28, 29, 30)
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31. A method of upgrading an encryption process for encryption of video information from an old encryption process to a new encryption process, comprising:
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selecting a portion of video content for selective encryption;
duplicating the selected portion of content to produce first and second copies of the selected portion;
encrypting the first copy of the selected portion using the old encryption process; and
encrypting the second copy of the selected portion using the new encryption process. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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Specification